X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86FrameLowering.cpp;h=edbe7d0894a0805e8cbb2ebaaea2b1888b15a3c0;hb=00552e3875ee5f382db6c98286a241a7d0efe1b8;hp=85c5b649913114ce6f0b8cbf8f7ceedaca681eac;hpb=edb6ecd65a759f77d8c693196af8235c1a7a3b5b;p=oota-llvm.git

diff --git a/lib/Target/X86/X86FrameLowering.cpp b/lib/Target/X86/X86FrameLowering.cpp
index 85c5b649913..edbe7d0894a 100644
--- a/lib/Target/X86/X86FrameLowering.cpp
+++ b/lib/Target/X86/X86FrameLowering.cpp
@@ -90,7 +90,7 @@ bool X86FrameLowering::hasFP(const MachineFunction &MF) const {
   return (MF.getTarget().Options.DisableFramePointerElim(MF) ||
           TRI->needsStackRealignment(MF) ||
           MFI->hasVarSizedObjects() ||
-          MFI->isFrameAddressTaken() || MFI->hasInlineAsmWithSPAdjust() ||
+          MFI->isFrameAddressTaken() || MFI->hasOpaqueSPAdjustment() ||
           MF.getInfo<X86MachineFunctionInfo>()->getForceFramePointer() ||
           MMI.callsUnwindInit() || MMI.callsEHReturn() ||
           MFI->hasStackMap() || MFI->hasPatchPoint());
@@ -794,6 +794,7 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF,
   int StackOffset = 2 * stackGrowth;
 
   while (MBBI != MBB.end() &&
+         MBBI->getFlag(MachineInstr::FrameSetup) &&
          (MBBI->getOpcode() == X86::PUSH32r ||
           MBBI->getOpcode() == X86::PUSH64r)) {
     PushedRegs = true;
@@ -967,13 +968,26 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF,
       .addReg(StackPtr)
       .setMIFlag(MachineInstr::FrameSetup);
     if (X86FI->getRestoreBasePointer()) {
-      // Stash value of base pointer.  Saving RSP instead of EBP shortens dependence chain.
+      // Stash value of base pointer.  Saving RSP instead of EBP shortens
+      // dependence chain. Used by SjLj EH.
       unsigned Opm = Uses64BitFramePtr ? X86::MOV64mr : X86::MOV32mr;
       addRegOffset(BuildMI(MBB, MBBI, DL, TII.get(Opm)),
                    FramePtr, true, X86FI->getRestoreBasePointerOffset())
         .addReg(StackPtr)
         .setMIFlag(MachineInstr::FrameSetup);
     }
+
+    if (X86FI->getHasSEHFramePtrSave()) {
+      // Stash the value of the frame pointer relative to the base pointer for
+      // Win32 EH. This supports Win32 EH, which does the inverse of the above:
+      // it recovers the frame pointer from the base pointer rather than the
+      // other way around.
+      unsigned Opm = Uses64BitFramePtr ? X86::MOV64mr : X86::MOV32mr;
+      addRegOffset(BuildMI(MBB, MBBI, DL, TII.get(Opm)), BasePtr, true,
+                   getFrameIndexOffset(MF, X86FI->getSEHFramePtrSaveIndex()))
+          .addReg(FramePtr)
+          .setMIFlag(MachineInstr::FrameSetup);
+    }
   }
 
   if (((!HasFP && NumBytes) || PushedRegs) && NeedsDwarfCFI) {
@@ -1412,9 +1426,11 @@ bool X86FrameLowering::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
   return true;
 }
 
-void
-X86FrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
-                                                       RegScavenger *RS) const {
+void X86FrameLowering::determineCalleeSaves(MachineFunction &MF,
+                                            BitVector &SavedRegs,
+                                            RegScavenger *RS) const {
+  TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
+
   MachineFrameInfo *MFI = MF.getFrameInfo();
 
   X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>();
@@ -1436,7 +1452,7 @@ X86FrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
 
   // Spill the BasePtr if it's used.
   if (TRI->hasBasePointer(MF))
-    MF.getRegInfo().setPhysRegUsed(TRI->getBaseRegister());
+    SavedRegs.set(TRI->getBaseRegister());
 }
 
 static bool
@@ -1667,8 +1683,6 @@ void X86FrameLowering::adjustForSegmentedStacks(
       .addImm(StackSize);
     BuildMI(allocMBB, DL, TII.get(MOVri), Reg11)
       .addImm(X86FI->getArgumentStackSize());
-    MF.getRegInfo().setPhysRegUsed(Reg10);
-    MF.getRegInfo().setPhysRegUsed(Reg11);
   } else {
     BuildMI(allocMBB, DL, TII.get(X86::PUSHi32))
       .addImm(X86FI->getArgumentStackSize());